Calipers



June 5, 1928. 1,672,765

1 P. LAGANA CALIPERS Filed June 5, 1927 15 Figure 1.

20 as at 1.3.

Patented June 5, 1928.

UNITED STATES PATENT OFFICE.

PHILIP LAGANA, or DARIEN, connnc'rrcur.

camrnns.

Application filed June 8,

This invention relates to calipers, and oon-, templates a novel construction and arrangement of parts whereby instantaneous and accurate measurement can be determined in a manner to be hereinafter clearly set fort the invention residing in the constructio combination and arrangement of parts as claimed.

In the dra wing forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein Figure 1 is a plan view of the instrument. Figure 2 is a view taken at rightangles to Referring to the drawing in detail, 10 and 11 indicate respectively a pair of arms piv oted as at 12, the corresponding, extremities of these arms being curved toward each other The pivot includes a thumb nut 15 so that the arms can be held relatively in any given position. Carried by and projet-ting from one side of the arm 11 adjacent the end thereof is a semi-circular arm 16 which is suitablygraduated as illustrated,

this arm 16 moving concentric with relation to thepivot 12 incident tothe movement of the arm 11. The adjacent end of the arm 10. is provided with a transverse slot through which the arm 16 moves, while the upper surface of this arm 10 is provided with an opening 17 through which the graduations in the arm 16 can he conveniently and easily read. The said slot is of a length greater than the width of the g aduated arm 16, al-

though one end of the slot bears against the outer or ad acent edge of said arm as 11llus-. trated. Pro ectmg within the opening 17 1927. Serial No. 198,355.

from one end thereof is a pointer or indiea:to1' 18 which overlies the curved arm 16, and is of course uscd in conjunction withthe gradnations to provide means whereby measurements can be instantaneously and accurately determined. While the invention is described in connection with a pair of calipers, Il IS desired to have it understood that the principle embodied in the invention is.

of crossedpivoted members, a semicircular graduated arm pro ecting from one side of 7 one ofsaid members, the other of said members having a longitudinal (slot through which the graduated arm passes, said slot being of a length greater than the width of said arm, with one end of the slot engaging the outer edge of the arm, the upper surface of said member having an opening, and a pointer projecting within the opening from the opposite end of the slot and overlying the gradiiatetl arm to cooperate with said graduations fort-he purpose specified.

. In testimony whereof I aitix my signature PHILIP LAGANA. 

